Pavel Durov, who has French citizenship, faces prosecution over alleged failure to suppress spread of sexual images of children and calls for violence

The head of Telegram, Pavel Durov, has been charged by the French judiciary for allegedly allowing criminal activity on the messaging app but avoided jail with a €5m bail.

The Russian-born multi-billionaire, who has French citizenship, was granted release on condition that he report to a police station twice a week and remain in France, Paris prosecutor Laure Beccuau said in a statement.

The charges against Durov include complicity in the spread of sexual images of children and a litany of other alleged violations on the messaging app.

His surprise arrest has put a spotlight on the criminal liability of Telegram, the popular app with around 1 billion users, and has sparked debate over free speech and government censorship.